You're absolutely right in that they have the resources to get these graded. Another comment I posted down below describes my grade situation and how I've been asked to help grade (for pay). I imagine in six months time I'll have my grades, but the wait is absolutely wrong. Other students are attempting to graduate, but their requirements are not met because of withheld grades by their TAs. Can they afford another quarter or two while the UC gathers new graders? Who knows.

The university is preventing people from graduating, not the TAs. The university could have professors grade their own exams. The university could hire undergraduates like you to grade exams. The university could also let anyone graduate that they want, the university is the body that enforces these requirements, not the TAs. They could send a memo tomorrow saying they would aggregate your other grades, or let you graduate provisionally, or waive whatever requirement the university itself has put in place, but they aren't because by not doing so they turn undergraduates like you against graduates. And from the looks of your comments they have succeeded.

And this is exactly what my professor has done in response to the graduate student strikes: she is some grading assignments herself and has dropped ones that she no longer has time for. I will probably receive my grades on time, and if I don’t I’m going to be a lot more annoyed at the university for not working something out than I will be at my TA (who has already submitted grades for assignments due before the strike).

I really hope you pay close attention to the comments by assdf replying to this. The graduate students clearly got desperate because of how crazy the financial situation got. It's sad to see how few people really recognize that. I hope you're lucky in life and never end up trapped the way they were!